1 AAE 450 Spring 2008 David Childers February 7, 2008 Interface Structures (skirts) Center of Mass Code Structures Cost Code

2 AAE 450 Spring 2008 Center of Mass  DeltaV=12km/s  Total Height=19.4 Structures Propellants1: Storables2: Hybrids3: Hybrid StagesDry CM (m)Wet CM (m)Material 1,2, Aluminum 2, Aluminum Aluminum StagesDry CM (m)Wet CM (m)Material 1,2, Steel 2, Steel Steel Mass is Symmetric Inputs from “old” model analysis code

3 AAE 450 Spring 2008 Cost  Assumptions –Estimated Titanium welding values Other welding values from Jeff Stuart –1 Rivet every 0.152m (6in) –Costs done with constant parameters Tank Material only variable changed –Propellants: Storable, Hybrid, Solid –DeltaV=12km/s Structures Future Work  Center of Mass over time  Cost of Welding and Materials  Use of Updated Model Analysis Functions Stage Material TypeTotal AllStl$1,912 AllAl$5,053 AllTi$93,540 1,2,3Stl,Al,Al$3,752 1,2,3Al,Stl,Ti$16,770 1,2,3Stl,Al,Ti$15,885 1,2,4Ti,Stl,Al$60,307

4 AAE 450 Spring 2008 CoM Samples Structures Rocket Length19.4m StagesDry CM (m)Wet CM (m)Material 1,2, Titanium 2, Titanium Titanium Rocket Length18.6m Propellants1: Storables2: Hybrids3: Solid StagesDry CM (m)Wet CM (m)Material 1,2, Aluminum 2, Steel Titanium

5 More CoM Samples Rocket Length18.6m StagesDry CM (m)Wet CM (m)Material 1,2, Aluminum 2, Aluminum Titanium Rocket Length18.6m StagesDry CM (m)Wet CM (m)Material 1,2, Steel 2, Steel Titanium AAE 450 Spring 2008 Structures

6 Full Cost of Samples Stage Material TypeWeldingRivetsMaterialTotal AllStl$1,198$416$297$1,912 AllAl$2,396$416$2,241$5,053 AllTi$4,794$416$88,331$93,540 1,2,3Stl,Al,Al$2,396$416$940$3,752 1,2,3Al,Stl,Ti$4,794$416$11,560$16,770 1,2,3Stl,Al,Ti$4,794$416$10,676$15,885 1,2,4Ti,Stl,Al$2,396$416$57,495$60,307 AAE 450 Spring 2008 Structures

7 Sources  Al - Youngstown Tool & Die Co.  Ti - TitaniumJoe.com  Steel - Youngstown Tool & Die Co.  carbon - RobotMarketplace.com  Jeff Stuart-Welding time values AAE 450 Spring 2008 Structures